Rajesh Balamohan created HIVE-23843:
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Summary: Improve key evictions in VectorGroupByOperator
Key: HIVE-23843
URL: https://issues.apache.org/jira/browse/HIVE-23843
Project: Hive
Issue Type: Improvement
Components: Hive
Reporter: Rajesh Balamohan
Keys in {{mapKeysAggregationBuffers}} are evicted in random order. Tasks also
get into GC issues when multiple keys are involved in groupbys. It would be
good to provide an option to have LRU based eviction for
mapKeysAggregationBuffers.
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